Abstract

The results of experimental investigations of novel ceramic high-temperature heat exchangers (HTHE)
and its main characteristics such as effectiveness and power load as a function of mass flow and the
geometry of the channels are presented. Firstly, some information on the background and the manufacturing
of the HTHE, which is based on honey comb structures made out of extruded silicon carbide, is
given. The experimental tests have been carried out with air as a heat transfer medium at temperatures
of up to 1000 �C. The experimental set-up is described in detail. The acquired characteristic temperature
and effectiveness data for different inlet temperatures and mass flows are discussed. They have been
compared with data from theoretical calculations as well as with characteristic data of typical counter
flow heat exchangers. Additionally, thermal shock tests have been carried out for a qualitative testing
of the mechanical strength. Finally, a conclusion and an outlook on further activities are given.